Apparatus for preventing smoke.



PATENTED MAR. 6, 1906.

P. A. LEWIS. APPARATUS FOR PREVENTING SMOKE.

APPLICATION FILED MAR.22, 1905.

FREDEBIUK ALBERT LEWIS, OF MELBOURNE, VICTORIA, AUSTRALIA.

APPARATUS FOR PREVENTING SMOKE.

Specification of Letters Patent.

ratented. March 6, 1906.

Application filed March 22, 1905. Serial No. 251,474- I To all whom itmay concern:

Be it known that I, FREDERICK ALBERT LEwIs, manufacturer, a subject ofthe King of Great Britain and Ireland, residing at 339 Flinders Lane,Melbourne, in the county of Bourke, State of Victoria, Commonwealth ofAustralia, have invented certain new and useful Improvements inApparatus for Preventing Smoke; and I do declare the following to be afull, clear, and exact description of the invention, such as will enableothers skilled in the art to which it appertains to make and use thesame.

The object of my invention is to provide a cheap and effective means ofarresting the smoke arising from the furnaces of vertical, horizontal,portable, stationary, or other classes of solid-fuel-firedsteam-boilers. In the ast a variety of devices have been used to thisend; but with my invention, which is cheap both inits application andmaintenance, the unconsumed fuel in a state of suspension in the furnace-crown is so attacked that combustion immediately occurs; but in orderthat my invention may be better understood I will now refer to theaccompanying sheet of drawings, which are to be taken as part of thisspecification and read herewith.

Figure 1 represents a front elevation of a boiler with my inventionapplied thereto. Fig. 2 is a side sectional elevation through the boilershown in Fig. 1. The fire-door frame and fire-door are removed. Fig. 3is a front elevation of a modification. Fig. 4 is an enlargedperspective View of the nozzle attached to the lower end of the combinedsteam and liquid pipe.

Similar letters of reference indicate similar or corresponding partswhere they occur in the several views.

My invention includes (when a spray consist' g of solution and steam isprojected over the fire) a solution-reservoir A. This reservoir is ofany material and for convenience is placed upon the boiler-to oradjacent thereto, as shown in Fig. 1. 8n the top of this reservoir is acover B, which may be attached to the said reservoir in any wellknownway. When the cover is removed, the reservoir is charged with liquid. Onthe side of the said reservoir is a gage-glass C. By this the height ofthe liquid within the reservoir is disclosed, or instead of a test-cocksmay be applied to the slde o the reservoir, or a float may be placedinside the said reservoir connected by a wire, chain, or

gagelass any other means to an indicator on the exterior of the saidreservoir. Near the reservoirbottom is attached a dischar e cock orvalve D. To this the inlet end 0 the dischargepipe E is connected. Thedischarge end of the said pipe is affixed to a combination steam-valve Sand injector F, placed upon the boiler-front. To the lower portion ofthe combination steam-valve and injector is attached the upper end of acombined steam and liquid pipe G. The lower end of this is attached to aspraying-nozzle H. This is situated in the crown of the furnace and nearthe fire-door top. It is so placed that it is nearest to the new-firedcoal, and it may have extensions from which to redistribute the spray.The said spray may be either coarse or fine. The spraying-nozzleconsists of right and left hand semicircularly-formed extensions. Thescbear against the furnacecrown and are preforated in such a manner thatthe spray may be distributed as far as the fire-bridge J. In thefurnace-door P is an air-door In the foregoing a solution (hereinafterdescribed) and steam are sprayed over the fire.

In a modification (when the solution sprayed over the fire is unmixedwith steam, but forced through by steam) the solutionreservoir A beforereferred to is under pressure. It has its cover B bolted or otherwisesecured to its shell. To charge the reservoir when under pressure, thereis attached to the cover a receiving-chamber This chamber is hollow, andabove it is an inlet-cock L. Above the said cock is a funnel M. Belowthe said receiving-chamber is a discharge-' cock N. From the boiler asteam-pipe 0, having a stop-cock R thereon, is connected to the top ofthe reservoir, and the dischargepipe E instead of communicating with acombination steam-valve S and injector F communicates direct with thesprayin -nozzle H. With the above-mentioned parts t e solutionhereinafter fdescribed in an undulated form by steam isforced in a sprayover the fire.

The liquid in the solution-tank is obtained by dissolving crystals ofsodium N 0 or Chilian or Peruvian saltpeter, cubic niter,sod2e nitras(L) in water. To this end there is added approximately one-half (1})pound of crystals to one (1) gallon of cold water. This is mixed andthenreservoir. Instead of sodium nitrate o the materials beforedescribed being dissolved n water potassium chlorate (K010 or chloplacedin the I nitrate (Na voir.

I reservoir.

rate of potash, potassii chloras, (L,) or potassic chlorate may be used.The dissolution of the above materials is so thorough that noprecipitation occurs when in the reservoir.

The cycle of operations when the solution and steam are sprayed'over thefire-top is as follows: The cover of the solution-reservoir is removedand the solution hereinbefore described poured into the same. Thedischargecock D is then opened and the liquid runs down to thecombination steam-valve S and injector F. The steam-valve on this is operred, and steam forces the liquid through the combined steam and liquidpipe to the sprayingnozzle H. Steam and solution are thus sprayed. Thecycle of operations when the solution only is sprayed over the fire-top,due to the pressure of steam in the reservoir-top, is as follows: Thedischarge-cock N being closed and the inlet-cock L bein open, liquid ispoured into the funnel M. t gravitates downwardly into thereceiving-chamber K When the said chamber is full, the inlet-cock L isclosed and the discharge-cock N opened. The li uid thereby falls downinto the reseren all has escaped, the dischargecock N is closed. Thesteam-cock R is then opened and also the discharge-cock D on the Theliquid fills the bottom of the reservoir, and as the discharge-cock D isopen the liquid passes down throu h the spraying nozzle H to the fire.So ution only is sprayed.

Having now described .my invention, what I claim as new, and desire tosecure by Letters Patent, is-

1. In an apparatus of the class described, the combination with aboiler, of a reservoir positioned upon said boiler, a removable top orcap carried by said reservoir, a valve secured to said reservoir, acombined steam valve and injector secured to said boiler, a

discharge-pipe connecting said valve and combined steam valve andinjector, a steam and liquid 'pipe secured to said combined steam valveand injector and extending over the fire-box of said boiler, cured tothe lower end of said steam and liquid ipe, said nozzle comprising rightand left and apertured, semicircular extensions. 2. In an apparatus ofthe class described, the combination with a boiler, of a reservoircarried by said boiler, a removable cover or cap carried by saidreservoir, a valve secured to said reservoir, a combined steam valve andinjector secured upon said boiler and communicating with the interiorthereof, a vertical discharge pipe connected to said valve carried bythe reservoir and to said steam valve and injector carried by saidboiler, a vertical steam and'liquid pipe secured to said combined steamvalve and injector, a nozzle secured to the lower end of said steam andliquid pipe, said nozzle comprising semicircular, apertured extensions,said extensions bearing against the furnacecrown.

.3. In an apparatus of the character described, the combination with aboiler, of a reservoir carried by said boiler, a removable cover carriedby said reservoir, a valve secured to said reservoir, a tubing or pipesecured to said valve and extendin into and over the fire-box, a nozzlesecure to the inner end of said tubing, said nozzle comprisingsemicircular, apertured extensions, said extensions engaging thefurnace-crown.

In testimony whereof I afiix my signature in the presence of twosubscribing witnesses.

FREDERICK ALBERT LEWIS.

Witnesses: I EDWIN PHILLIPS, CECIL W. LE PLASTRIER.

and a nozzle se-

